SOLUTION: http://prntscr.com/8vcrv6 Link to question help please , thanks.

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Question 998957: http://prntscr.com/8vcrv6
Link to question help please , thanks.

Answer by KMST(5328) About Me  (Show Source):
You can put this solution on YOUR website!
The function should be defined as
f%28x%29=system%28%281%2F4%29x%2B5%2F4%2C2x%2B3%2C-3x%2B18%29 matrix%284%2C2%2C%22+%22%2C%22+%22%2Cif%2Cx%3C=a%2Cif%2Ca%3Cx%3C=b%2Cif%2Cb%3Cx%29 .
That "if b>x" on the last line does not make sense.

f%28a%29=%281%2F4%29a%2B5%2F4
If the function is to be continuous at x=a ,
for a must equal f%28a%29 .
2a%2B3=%281%2F4%29a%2B5%2F4-->4%28a%2B3%29=4%28%281%2F4%29a%2B5%2F4%29-->8a%2B12=4%281%2F4%29a%2B4%285%2F4%29-->8a%2B12=a%2B5-->8a-a=5-12-->7a=-7-->a=-7%2F7-->highlight%28a=-1%29

f%28b%29=2b%2B3
If the function is to be continuous at x=b ,
for b must equal f%28b%29 .
2b%2B3=-3b%2B18-->2b%2B3b=18-3-->5b=15-->b=15%2F5-->highlight%28b=3%29